瑜伽論記 13.31

13.31

From 'Established through this, the Buddha, the World-Honoured One...' below, in the second part, the answer, three answers are given corresponding to the questions. This is the answer to the first question. That is, the ālaya is subtle, and bodhisattvas before the stages generate understanding according to teaching without having fully penetrated it; therefore, for the two vehicles it is not distinguished for them; hence it says it was kept a secret teaching, which is why it was not spoken of.